A circuit testing nowadays is expensive and complex process. That’s why circuits testing, errors finding and fixing require more and more investments. One of possible ways of reducing cost and speed up testing process is increasing controllability and observability of circuits. It takes a lot of time to find out circuit’s controllability and observability that’s why that process have to be computerized. For that purpose was decided to create software which will be helpful for circuit designers in that process. As a result it will help designers in making design for testability schemes. Research and training action for system on chip using internet software is dedicated for users that have C/C++ system on chip code from every place in the world, using only web browser, would be able put that code in to the server, test it and retrieve it‘s observability results in text and visual modes and also increase system’s on chip observability level. And as well review and get acquainted with systems on chip that are already on the server and are stored on it. Software architecture uses client-server mode. All computations are performed on a server side. System is realized on Apache server with Linux OS. System modules are realized using HTML, JAVA, PHP, JavaScript, C++ and CGI programming languages. Web page is working independent from users OS, user needs only web browser (Internet Explorer not older than 3.0 ver., Opera not older than 6.0 ver., Netscape Navigator not older... [to full text]